itch.io

I would like to ask you a few questions and I could not contact you anywhere else (you do not seem to have a contact email address and your Patreon has 99.9% of its posts locked for non-paying members). I might be interested in buying all of your assets (the last plan in Patreon), but I first want to make sure I put my money in the right place. I would like to know the following:
1) In assets packs like the fish folk village, there seem to be water animations in the side of the shore, but since your asset packs only have export options in .PNG and .JSON I am curious how (and if) those animations can actually be imported into a game.
2) Your assets are often positioned in example scenes, some of which do not actually exist as purchasable assets. for instance, the most common one is the castle arena or whatever I may call it (the one from mage arena). You often portray your characters in that scene, but as far as I am aware, there is no castle OR arena tileset (very unfortunately). Are those coming at any point? Or are they already accessible through, say your patreon?
3) You seem to be going for a completionist pattern with your uploads. Although you do not release your assets in specific-themed sets, those seem to always get completed along the way, resulting in every asset eventually being fully integratabtle to a complete game. But there are some exceptions to that: your futuristic tiles for example, although there are character and prop sets to fill it in with, there are no lab exterior assets or anything of the sort, which would make the entire thing as a whole very hard to integrate into a full game. Are you actually planning to always complete every aspect of the asset world you have created, or are some of them just going to remain incomplete? (and I do understand that you mainly upload assets based on the polls you run, but I am asking wether you are going to complete the continuity with thematic sets you have already started uploading).
4) One of the most important ones here: in patreon, the archivist tier claims it gives access to "everything", but in the full asset list you have linked in the top of your itch.io page, prices are stated both for itch.io AND for the archivist patreon tier SEPARATELY. Does this mean that if I do purchase the archivist tier, I just gain the ABILITY to purchase the assets themselves through additional payments, or do I actually get to download all of them after that first big transaction? And with patreon tiers in general: are the assets they say they "unlock" actually unlocked for free, or through more additional purchases?
5) Lastly, are there any engine-specific ways to easily create tile pallettes with your assets or import them into an engine easier overall? I personally use Unity Engine, and I would appreciate knowing if there are any shortcuts/ difficulties I might exploit/ come across while trying to use all of your assets in my engine.
Sorry for the massive wall of text, but as a (completely broke) solo developer, I am trying to make 100% I can out of my money's worth. I do not even know if my upcoming project will make me any money at all, so I cannot afford to overbuy. I hope you understand and my big essay over here didn't tire you! Just know that your art looks insanely good and if some of the questions I asked here are answered the way I expect them to, you've gained yourself a new very loyal customer! Again, thanks for reading all the way through!